Home / 100,237.08-138,011.58-85,099.80

Finding the Fourth Proportional to 100,237.08, 138,011.58 and 85,099.80

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Solution

The fourth proportional to 100,237.08, 138,011.58 and 85,099.80 is: 117,169.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,237.08 : 138,011.58 = 85,099.80 : x
  2. Step 2: Convert to fraction form
    100,237.08/138,011.58 = 85,099.80/x
  3. Step 3: Cross multiply
    100,237.08x = 138,011.58 × 85,099.80
  4. Step 4: Simplify right side
    100,237.08x = 11,744,757,855.68
  5. Step 5: Solve for x
    x = 11,744,757,855.68/100,237.08
  6. Step 6: Final answer
    x = 117,169.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.